Patent US3579684A successfully refreshed from Google Patents.
US3579684A
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US
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Methods of making self-locking threaded elements
Assignee: Emhart Industries Inc
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Filing: 1968-11-25
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Granted: 1971-05-25
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Expires: 1988-11-25
Abstract
Abstract METHOD OF MAKING A SELF-LOCKING THREADED ELEMENT, E.G. A SCREW INCLUDING A STRONGLY ADHERED CONVEXLY CURVED PLASTIC BODY ON ITS THREADED SURFACE ALLOWING SMOOTH ASSEMBLY AND GIVING STRONG FRICTIONAL ENGAGEMENT BETWEEN THE ELEMENT AND A MATING THREADED SURFACE. IN THE METHOD, A STREAM OF FINE PARTICLES OF HEAT-SOFENTABLE PLASTIC IS DIRECTED AGAINST A THREADED SURFACE PORTION OF A HEATED METALLIC ELEMENT. CONTACTING PARTICLES ARE CAUGHT ON THE HEATED SURFACE AND FUSED BY HEAT FROM THE ELEMENT TO FORM A CONTINUOUS PLASTIC BODY WHICH IS THEN HARDENED BY COOLING.
Inventors
- 👤 Richard J Duffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:36
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/56; B05; B05B; B05B1/00; B05B1/02; B05B1/04; B05B1/044; B05B13/00; B05B13/02; B05B13/0221; B05B13/0264; B05B7/00; B05B7/14; B05B7/1481; B05B7/1486; F; F16; F16B; F16B33/00; F16B33/06; F16B39/00; F16B39/22; F16B39/28; F16B39/34; B05D; B05D2202/00; B05D2258/00; B05D2258/02; B05D2401/00; B05D2401/30; B05D2401/32; B05D3/00; B05D3/02; B05D3/0218; Y; Y10; Y10S; Y10S470/00; Y10S470/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |